The invention discloses a gold attapulgite nano immobilized catalyst and a preparation method and application thereof. Attapulgite is adopted as a catalyst carrier, gold is adopted as an active component, the average grain size of the catalyst ranges from 3 nm to 8 nm, and the mass fraction of gold in the catalyst ranges from 0.5% to 2%. The gold attapulgite nano immobilized catalyst has the advantages of being clean, environmentally friendly and convenient to use, and has excellent catalytic performance on reducing nitrophenol into aminophenol.